3036661621 has 4 divisors (see below), whose sum is σ = 3470470432. Its totient is φ = 2602852812.

The previous prime is 3036661547. The next prime is 3036661627. The reversal of 3036661621 is 1261666303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1261666303 = 31 ⋅40698913.

It is not a de Polignac number, because 3036661621 - 2²³ = 3028273013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3036661627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216904395 + ... + 216904408.

It is an arithmetic number, because the mean of its divisors is an integer number (867617608).

Almost surely, 2^3036661621 is an apocalyptic number.

It is an amenable number.

3036661621 is a deficient number, since it is larger than the sum of its proper divisors (433808811).

3036661621 is an equidigital number, since it uses as much as digits as its factorization.

3036661621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433808810.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 3036661621 is about 55105.9127589771. The cubic root of 3036661621 is about 1448.1008225039.

The spelling of 3036661621 in words is "three billion, thirty-six million, six hundred sixty-one thousand, six hundred twenty-one".